DRY-PACKED BEDS FOR THE REMOVAL OF STRONG-ACID GASES FROM RECYCLED ATMOSPHERES.
NAVAL RESEARCH LAB WASHINGTON D C
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Under certain conditions, strong-acid gases can be formed in recycled atmospheres by the combustion of halogenated hydrocarbons. One control measure involves the use of a dry absorbent filter. Li2CO3 has already been used as an absorbent in these filters as a result of a screening test of a number of scavenger materials. In this report the absorptive properties of some other potentially useful materials were examined. Baralyme and soda lime were superior to Li2CO3 in air at 76F and over 50 R.H., while the silica-alumina catalyst with monoethanolamine MEA impregnant and the silica-magnesia catalyst were almost as effective as Li2CO3. However, Baralyme, soda lime, various basic materials MEA, gaseous NH3, Na2CO3, and quinoline supported on the silica-alumina catalyst, and the silica-magnesia catalyst were all useless at 140F, especially under dry conditions. Li2CO3, therefore, still remains as the most effective absorbent throughout the range of probable conditions. Author
- Industrial Chemistry and Chemical Processing
- Life Support Systems